International organizations and rights groups had earlier sounded the alarm over conditions in Al Hol, described by Human Rights Watch in July as a "dust bowl inferno" where young children with "emaciated limbs and swollen bellies sifted through mounds of stinking garbage under a scorching sun or lay limp on tent floors, their bodies dusted with dirt and flies."
The conditions have fueled tensions in the camp, where radicalised women had carried out attacks, beatings and the burning of tents of women who were perceived as "infidels," the commission noted.
Although some countries have repatriated their nationals, the commission said it had seen no effort by most countries to understand who was in the camp and who should be taken back, flouting their obligations to the children under international conventions, the report said.
The women and children trapped in this legal and political limbo "remain at higher risk of further radicalisation," the commission said.
At a time when states were looking for ways to tackle root causes of violent radicalisation, their inaction on Al Hol was instead creating "another generation of people with grievances against us," said Hanny Megally, a commission member.
Britain drew international criticism last month over its decision to strip the citizenship of Jack Lets, a former Islamic State fighter, as well as that of teenager Shamima Begum, whose infant died in Al Hol in March.
The US defense secretary, Mark Esper, warned this month that refusal by Britain and other European countries to repatriate around 2,000 former fighters was creating an "untenable situation" that posed a threat to the region's security.
UN analysts, drawing on intelligence from member states, warned last month that Islamic State members remained active in Syria and have crossed into Iraq, successfully building a covert network of cells and creating safe havens that posed a major threat to security.
Written by: Nick Cumming-Bruce
Photographs by: Ivor Prickett
© 2019 THE NEW YORK TIMES